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Sea Level to Rise 50 Feet by 2300… Oh noes!!!

Global Sea Level Could Rise 50 Feet by 2300, Study Says

Characterizing what’s known and what’s uncertain is key to managing coastal risk

October 6, 2018

Global average sea-level could rise by nearly 8 feet by 2100 and 50 feet by 2300 if greenhouse gas emissions remain high and humanity proves unlucky, according to a review of sea-level change and projections by Rutgers and other scientists.

Since the start of the century, global average sea-level has risen by about 0.2 feet. Under moderate emissions, central estimates of global average sea-level from different analyses range from 1.4 to 2.8 more feet by 2100, 2.8 to 5.4 more feet by 2150 and 6 to 14 feet by 2300, according to the study, published in Annual Review of Environment and Resources.

RCP8.5 fraud alert!

Future sea-level rise generates hazards for coastal populations, economies, infrastructure, and ecosystems around the world. The projection of future sea-level rise relies on an accurate understanding of the mechanisms driving its complex spatio-temporal evolution, which must be founded on an understanding of its history. We review the current methodologies and data sources used to reconstruct the history of sea-level change over geological (Pliocene, Last Interglacial, and Holocene) and instrumental (tide-gauge and satellite alimetry) eras, and the tools used to project the future spatial and temporal evolution of sea level. We summarize the understanding of the future evolution of sea level over the near (through 2050), medium (2100), and long (post-2100) terms. Using case studies from Singapore and New Jersey, we illustrate the ways in which current methodologies and historical data sources can constrain future projections, and how accurate projections can motivate the development of new sea-level research questions across relevant timescales.